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Wed, 13 Dec 2023 07:36:41 -0800 (PST) On 12/12/2023 10:34 AM, Borislav Petkov wrote: > On Tue, Dec 12, 2023 at 09:23:44AM -0500, Yazen Ghannam wrote: >> I'm thinking that the warning only happens if the "assert" condition above >> is hit. > > assert usually means "assert - abort the program if assertion is false" > - from assert(3). > Right, agreed. In this context, the program is the translation method. But yeah, it doesn't make much sense describing the kernel. I'll change the wording if I don't drop the macros completely. >> In older revisions, I had all these messages as "debug" loglevel. I don't >> think there's anything a user can do to fix these issues. They're either >> coding bugs in the library or system configuration. >> >> I'd rather go back to the debug messages if you don't mind. It's not >> difficult to enable dynamic debug messages compared to DEBUG Kconfig >> options. So I think it'd be okay to work with users on this if they >> encounter an issue. > > Makes sense. > >>>> +static const struct x86_cpu_id amd_atl_cpuids[] = { >>>> + X86_MATCH_FEATURE(X86_FEATURE_SMCA, NULL), >>> >>> I'd expect for only this one to be needed, but not those below. >>> >> >> Me too. Those below are to workaround a current module loading issue. I'll >> add a code comment for that. > > You mean the systemdoofus crap? > > Fget it - we don't fix the kernel because luserspace is nuts. > >> >>>> + X86_MATCH_FEATURE(X86_FEATURE_ZEN, NULL), > > ...and those are influx - this is called X86_FEATURE_ZEN1 now and > X86_FEATURE_ZEN is set on all Zens. So you might as well match on > X86_FEATURE_ZEN only. > > But you should not need it - if SMCA doesn't match then we have another > problem. ATL should load on SMCA systems only. > I agree in principle. But I don't think it hurts to include an additional line to avoid the confusion when the module doesn't load. Also, the SMCA feature is used here as a short-cut to match on systems with a Data Fabric. We could use the Zen feature in the same way. Thanks, Yazen